Kenwood VT-183 Service Manual Download Page 1 | Manualshive

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Kenwood VT-183 Service Manual Download Page 1

HANDLE

: (K01-0564-08)

HANDLE COVER : (B09-0410-08)

FRONT PANEL
(A63-0302-08)

SIDE FRAME
(A13-2254-08)

PUSH KNOB
(K24-3015-08)

KNOB
(K21-0961-08)

PUSH KNOB
(S68-0660-08)

RUBBER FOOT
(J02-0543-08)

AUTOMATIC AC VOLTMETER

VT-183

SERVICE MANUAL

KENWOOD TMI CORPORATION

© 1998-5/B51-1133-00 (K/K)

VT-183(K)

internet

98.6.8

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Summary of Contents for VT-183

Page 1: ...ANEL A63 0302 08 SIDE FRAME A13 2254 08 PUSH KNOB K24 3015 08 KNOB K21 0961 08 PUSH KNOB S68 0660 08 RUBBER FOOT J02 0543 08 AUTOMATIC AC VOLTMETER VT 183 SERVICE MANUAL KENWOOD TMI CORPORATION 1998 5 B51 1133 00 K K VT 183 K internet98 6 89 34AM y W 2 ...

Page 2: ...form any servicing other than contained in the operating instructions unless you are qualified to do so WARNING CONTENTS SPECIFICATIONS 3 SAFETY 4 CIRCUIT DESCRIPTION 5 BLOCK DIAGRAM 7 ADJUSTMENT 8 PARTS LIST UNIT 10 PARTS LIST ELECTRICAL 11 SCHEMATIC DIAGRAM 14 P C BOARD 18 VT 183 K internet98 6 89 34AM y W 3 ...

Page 3: ...e Distortion Signal to noise ratio 1Vrms full scale 20 600Ω 20 at 1kHz Within 3dB at 10Hz to 500kHz Less than 1 at full scale Rated by signal noise ratio in 1mV and 1V ranges Over 40dB at full scale Output voltage Offset voltage Output resistance Frequency response DC output Amplifier Section 1V 20 offset voltage at full scale 100mV Less than 10mVrms Within 3 at 10Hz to 1MHz Coefficient Temperatur...

Page 4: ... proper fuse is installed by replacing the line fuse Voltage conversion This instrument can be operated from 100 to 230V 50 60Hz power source Use the following procedure to change from 100 to 230V operation or vice versa 1 Remove the fuse holder 2 Replace fuse F1 with a fuse of appropriate value 3 Reinsert it for appropriate voltage range 4 When performing the reinsertion of fuse holder for the vo...

Page 5: ... loads 7 Absolute Mean Valve Detector An absolute mean value detector comprised of a high through rate and high gain amplifier Which has a very good linearity by negative feedback from the current flowing through the Meter load In switching this provides a suffi ciently wide frequency band so that the high frequency phase compensation circuit is reset 8 Attenuator Control A logic control circuit c...

Page 6: ...ischarge circuit and the both Up Down comparator 10 Up Down Counter The pulse from the UP Down pulse control gate circuit will trigger the Up Down counter and which output design the attenuation range of the meter board 11 Decoder This decoder convert the 4 bit binary code from the Up Down counter to a 12 bit control signal which drive the attenuator control on the meter board 12 Up Down Pulse Con...

Page 7: ...ANCE CONVERTER 1st ATT POWER TRANSFORMER ON OFF POWER DC 5V PEAK HOLD REGULATOR RECTIFIER OUTPUT CIRCUIT DIFFERENTIATOR DOWN COMPARATOR OSCILLATOR UP DOWN COUNTER DECODER UP COMPARATOR UP DOWN PULSE CONTROL GATE CIRCUIT DC 5V DISCHANGE CIRCUIT UP SW DOWN SW MODE SW RANGE DISPLAY CONTROL BD DC OUTPUT REMATE INPUT VT 183 7 ADJUSTMENT VT 183 K internet 98 6 8 9 38 AM y W 14 ...

Page 8: ...nt turn the power on and warm up the scope suffi ciently more than 30 minutes before starting Before calibrating the unit check the power supply voltage TEST EQUIPMENT REQUIRED The following instrument or their equivalent should be used for making adjustment PREPARATION FOR ADJUSTMENT Control Settings The control settings listed below must be used for each adjustment procedure Exceptions to these ...

Page 9: ... set points at 9 0 2 Adjust the TC so that the pointer points at 9 0 when the frequency is changed to 100 kHz while the oscillator output remains unchanged Auto VR202 change over RANGE 1V point Hi change over point 102 VR201 Lo change over point 27 VR202 1 Hi adjustment Input 1 kHz 1 02 V sine wave and make adjustment so that the range will change at the 102 point 2 Lo adjustment Input 1 kHz 0 27 ...

Page 10: ... CORD E30 1986 08 SAA POWER CORD E68 0626 08 AC INLET F11 1528 08 SHIELD CASE F15 0785 08 BLIND PLATE F50 0131 08 FUSE 5 20 0 315A 250V F50 0132 08 FUSE 5 20 0 5 250V H10 2894 08 FOAMED STYREN PAD H20 1750 08 VINYL COVER H53 0235 08 CARTON BOX J02 0543 08 RUBBER FOOT J11 0513 08 CLAMPER J21 8927 08 BRACKET K01 0564 08 HANDLE K21 0961 08 KNOB L07 1552 08 POWER TRANSFORMER N09 4530 08 SCREW SEMS BIN...

Page 11: ...C143 CC45FCH1H070D CAP CERAMIC 7P D 50V C147 CQ92FM1H103J CAP PLASTIC 0 01U J 50V C148 CC45FCH1H100J CAP CERAMIC 10P J 50V C150 CQ92BPA1H122K CAP PLASTIC 1200P K 50V C151 CQ92FM1H104J CAP PLASTIC 0 1U J 50V C152 CE04EW1A471Z CAP ELECTRO 470U Z 10V C153 CC45FCH1H010C CAP CERAMIC 1P C 50V D101 1N4148 DIODE D106 1N4148 DIODE D107 1N4148 DIODE D108 1N4148 DIODE D109 1N4148 DIODE D110 1N4148 DIODE D111...

Page 12: ...TAL FILM 6 19K F 1 8W 3 New Parts Parts without Parts No are not supplied Les articles non mentionnes dans le Parts No ne sont pas fournis Teile ohne Parts No werden nicht geliefert Ref No Add ress Description Parts No L Scandinavia K USA P Canada R Mexico Y PX Far East Hawaii T Europe E Europe G Germany Y AAFES Europe X Australia M Other Areas indicates safety critical components R145 RD14BB2B681...

Page 13: ...392J RES CARBON 3 9K F 1 4W R219 RD14BB2E114J RES CARBON 110K J 1 4W R220 RD14BB2E392J RES CARBON 3 9K F 1 4W R221 RD14BB2E223J RES CARBON 22K J 1 4W R222 RD14BB2E102J RES CARBON 1K J 1 4W R223 RD14BB2E334J RES CARBON 330K J 1 4W R224 RD14BB2E223J RES CARBON 22K J 1 4W R225 RD14BB2E223J RES CARBON 22K J 1 4W 5 New Parts Parts without Parts No are not supplied Les articles non mentionnes dans le Pa...

Page 14: ...A B D C E 2 1 3 5 7 4 6 SCHEMATIC DIAGRAM VT 183 K internet 98 6 8 9 38 AM y W 13 ...

Page 15: ...F H J G I 2 1 3 5 7 4 6 SCHEMATIC DIAGRAM VT 183 K internet 98 6 8 9 38 AM y W 12 ...

Page 16: ...K L N M O 2 1 3 5 7 4 6 SCHEMATIC DIAGRAM VT 183 K internet 98 6 8 9 37 AM y W 9 ...

Page 17: ...P R T Q S 2 1 3 5 7 4 6 SCHEMATIC DIAGRAM VT 183 K internet98 6 89 37AM y W 8 ...

Page 18: ...130 R128 J116 C103 P101 J119 U1 U101 D106 R125 R124 J102 J101 R135 C114 R108 D122 R131 R133 J128 J103 R139 R116 C115 R110 R120 R121 R117 P102 C113 VR102 R115 R114 K102 D119 R132 P10 R147 R119 R136 P8 R129 R145 R140 R141 R113 R112 J110 R142 R146 C147 R109 C108 C135 U103 R178 R143 J104 C112 J3 R107 R106 R155 J1 R104 J2 P9 C111 R144 C104 D101 U102 R153 D103 D143 D140 R103 K101 R185 J109 R152 D102 C10...

Page 19: ...6 C211 R216 C210 R228 Q209 C209 J104 C206 R237 C214 R205 Q202 R202 C203 C205 R226 VR202 VR201 R210 D201 J103 Q208 Q206 Q207 Q2 05 J106 J111 D205 R231 R219 R229 R213 J102 R235 R212 R234 R214 R233 R208 C216 C215 R211 J122 R239 R238 J120 J119 J112 J101 R207 C204 J109 R206 R204 J117 R 244 J107 R201 R203 R220 C201 C202 P 201 R222 R227 J110 R221 Q201 19 PC BOARD Component side view CONTROL UNIT W02 2363...

Page 20: ...VT 183 A product of KENWOOD TMI CORPORATION 1 16 2 Hakusan Midori ku Yokohama City 226 Japan VT 183 K internet98 6 89 34AM y W 1 ...

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